NEET 2024

Given below are two statements:
Statement I : Parenchyma is living but collenchyma is dead tissue.
Statement II : Gymnosperms lack xylem vessels but presence of xylem vessels is the characteristic of angiosperms.
In the light of the above s...

In the given figure, which component has thin outer walls and highly thickened inner walls?

Consider the following statements :
A. Annelids are true coelomates
B. Poriferans are pseudocoelomates
C. Aschelminthes are acoelomates
D. Platyhelminthes are pseudocoelomates
Choose the correct answer from the options given below :

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The following are the statements about non-chordates:
A. Pharynx is perforated by gill slits.
B. Notochord is absent.
C. Central nervous system is dorsal.
D. Heart is dorsal if present.
E. Post anal tail is absent.
Choose the most appropria...

The type of conservation in which the threatened species are taken out from their natural habitat and placed in special setting where they can be protected and given special care is called

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These are regarded as major causes of biodiversity loss:
A. Over exploitation
B. Co-extinction
C. Mutation
D. Habitat loss and fragmentation
E. Migration
Choose the correct option:

Tropical regions show greatest level of species richness because
A. Tropical latitudes have remained relatively undisturbed for millions of years, hence more time was available for species diversification.
B. Tropical environments are more ...

List of endangered species was released by

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Which one of the following is not a criterion for classification of fungi?

Lecithin, a small molecular weight organic compound found in living tissues, is an example of:

Match List I with List II:

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Match List I with List II

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Inhibition of Succinic dehydrogenase enzyme by malonate is a classical example of:

The cofactor of the enzyme carboxypeptidase is:

Regarding catalytic cycle of an enzyme action, select the correct sequential steps :
A. Substrate enzyme complex formation.
B. Free enzyme ready to bind with another substrate.
C. Release of products.
D. Chemical bonds of the substrate brok...

Given below are two statements:
Statement I : Bt toxins are insect group specific and coded by a gene cry IAc.
Statement II : Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive prot...

The capacity to generate a whole plant from any cell of the plant is called:

Which of the following are fused in somatic hybridization involving two varieties of plants?

What is the fate of a piece of DNA carrying only gene of interest which is transferred into an alien organism?
A. The piece of DNA would be able to multiply itself independently in the progeny cells of the organism.
B. It may get integrated...

Match List I with List II

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Which of the following statements is incorrect?

The following diagram showing restriction sites in E. coli cloning vector pBR322. Find the role of ‘X’ and ‘Y’ genes :

Hind II always cuts DNA molecules at a particular point called recognition sequence and it consists of:

The "Ti plasmid" of Agrobacterium tumefaciens stands for

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Following are the stages of pathway for conduction of an action potential through the heart
A. AV bundle
B. Purkinje fibres
C. AV node
D. Bundle branches
E. SA node
Choose the correct sequence of pathway from the options given below

Which of the following factors are favourable for the formation of oxyhaemoglobin in alveoli?

Match List I with List II:

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Given below are two statements:
Statement I : Chromosomes become gradually visible under light microscope during leptotene stage.
Statement II : The beginning of diplotene stage is recognized by dissolution of synaptonemal complex.
In the l...

Spindle fibers attach to kinetochores of chromosomes during

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Following are the stages of cell division :
A. Gap 2 phase
B. Cytokinesis
C. Synthesis phase
D. Karyokinesis
E. Gap 1 phase
Choose the correct sequence of stages from the options given below :

Match List I with List II

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Match List I with List II :

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The DNA present in chloroplast is:

Given below are two statements:
Statement I: Mitochondria and chloroplasts both double membranes bound organelles.
Statement II: Inner membrane of mitochondria is relatively less permeable, as compared chloroplast.
In the light of the above...

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : FSH acts upon ovarian follicles in female and Leydig cells in male.
Reason R : Growing ovarian follicles secrete estrogen ...

Which of the following is not a steroid hormone?

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In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is \(100 x\left(\mathrm{kcal} \mathrm{~m}^{-2}\right) \mathrm{yr}^{-1}\), what would be the GPP (Gross Primary Productivity) of the third trophic level of the same...

Given below are some stages of human evolution.
Arrange them in correct sequence. (Past to Recent)
A. Homo habilis
B. Homo sapiens
C. Homo neanderthalensis
D. Homo erectus
Choose the correct sequence of human evolution from the options give...

The flippers of the Penguins and Dolphins are the example of the

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Choose the correct statement given below regarding juxta medullary nephron.

Given below are two statements :
Statement I : In the nephron, the descending limb of loop of Henle is impermeable to water and permeable to electrolytes.
Statement II : The proximal convoluted tubule is lined by simple columnar brush borde...

Match List I with List II:

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